Free up power in your Focus ST's engine with the Cobb 3" Downpipe! This direct replacement for the factory downpipe features a 200 cell count high flow catalytic converter and high quality 304 stainless steel tubing. The CNC machined v-band flange and 4" flex section ensure perfect OEM-like fitment. All of these features create a free flowing exhaust reducing turbo back pressure and increased turbo efficiency. This downpipe is the perfect step towards Stage 3 power! Stage 3 off-the-shelf maps are available for the Focus ST Accessport for a perfectly tuned out-of-the-box experience.